Question 1

How many liters are in a US gallon?

Accepted Answer

Exactly 3.785411784 liters. This is the exact US legal definition. Note: 1 Imperial (UK) gallon = 4.54609 liters — about 20% larger.

Question 2

How many cups are in a gallon?

Accepted Answer

In the US system: 1 gallon = 16 cups = 8 pints = 4 quarts = 128 fluid ounces. These are exact relationships within the US customary system.

Question 3

What is the difference between US and Imperial gallons?

Accepted Answer

A US gallon = 3.785 L. An Imperial (UK) gallon = 4.546 L. They share the same name but differ in volume — 1 UK gallon is about 20% larger than 1 US gallon. Always check which gallon is meant on recipes or fuel specs.

Question 4

How many ml is a teaspoon?

Accepted Answer

A US teaspoon = 4.92892 mL. However, in cooking and medicine, 5 mL is commonly used as the rounded standard. For precise lab or recipe work, use 4.929 mL.

Question 5

What is a cubic foot in liters?

Accepted Answer

1 cubic foot = 28.3168 liters exactly (since 1 foot = 0.3048 m exactly, so 1 ft³ = 0.3048³ m³ = 28316.847 cm³ = 28.3168 L).

Question 6

How many fluid ounces in a cup?

Accepted Answer

1 US cup = 8 US fluid ounces exactly. Note: a UK fluid ounce is slightly different (28.413 mL vs 29.574 mL for US). Always use the same system throughout a recipe.

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Frequently Asked Questions

How many liters are in a US gallon?

How many cups are in a gallon?

What is the difference between US and Imperial gallons?

How many ml is a teaspoon?

What is a cubic foot in liters?

How many fluid ounces in a cup?

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